About Seller: Chicago Stainless Equipment was established in 1937 with a focus on manufacturing milk storage tanks. Since then, the company has expanded its expertise to encompass design and production in packaging, filling, and pasteurization. In the 1950s, Chicago Stainless Equipment introduced the first sanitary pressure gauge specifically for use on their storage tanks. This groundbreaking gauge received a U.S. patent for its innovative design. Although modern sanitary pressure gauges are based on similar principles as our original design, no other manufacturer can rival our extensive experience, high standards, and exceptional service.